72225387 has 12 divisors (see below), whose sum is σ = 112350784. Its totient is φ = 44446320.

The previous prime is 72225343. The next prime is 72225407. The reversal of 72225387 is 78352227.

It is a happy number.

It is not a de Polignac number, because 72225387 - 2¹¹ = 72223339 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72225187) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 308539 + ... + 308772.

Almost surely, 2^72225387 is an apocalyptic number.

72225387 is a deficient number, since it is larger than the sum of its proper divisors (40125397).

72225387 is a wasteful number, since it uses less digits than its factorization.

72225387 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 617330 (or 617327 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The square root of 72225387 is about 8498.5520531441. The cubic root of 72225387 is about 416.4504085951.

The spelling of 72225387 in words is "seventy-two million, two hundred twenty-five thousand, three hundred eighty-seven".